miun.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Image-based stress and strain measurement of wood in the split-Hopkinson pressure bar
Department of Mechanical Engineering and Industrial Systems, Tampere University of Technology, PO Box 589, Tampere, Finland.
Department of Mechanical Engineering and Industrial Systems, Tampere University of Technology, PO Box 589, Tampere, Finland.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.ORCID iD: 0000-0003-3381-5516
Department of Automation Science and Engineering, Tampere University of Technology, PO Box 692, Tampere, Finland .
2015 (English)In: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 26, no 8, 085206Article in journal (Refereed) Published
Abstract [en]

The properties of wood must be considered when designing mechanical pulping machinery. The composition of wood within the annual ring is important. This paper proposes a novel image-based method to measure stress and planar strain distribution in soft, heterogeneous materials. The main advantage of this method in comparison to traditional methods that are based on strain gauges is that it captures local strain gradients and not only average strains. Wood samples were subjected to compression at strain rates of 1000-2500 s-1 in an encapsulated split-Hopkinson device. High-speed photography captured images at 50 000-100 000 Hz and different magnifications to achieve spatial resolutions of 2.9 to 9.7 μm pixels-1. The image-based analysis utilized an image correlation technique with a method that was developed for particle image velocimetry. The image analysis gave local strain distribution and average stress as a function of time. Two stress approximations, using the material properties of the split-Hopkinson bars and the displacement of the transmitter bar/sample interface, are presented. Strain gauges on the bars of the split-Hopkinson device give the reference average stress and strain. The most accurate image-based stress approximation differed from the strain gauge result by 5%. © 2015 IOP Publishing Ltd.

Place, publisher, year, edition, pages
2015. Vol. 26, no 8, 085206
Keyword [en]
digital image correlation, local strain, split-Hopkinson pressure bar, stress approximation, wood
National Category
Materials Engineering Mechanical Engineering
Identifiers
URN: urn:nbn:se:miun:diva-25894DOI: 10.1088/0957-0233/26/8/085206ISI: 000362220900042Scopus ID: 2-s2.0-84940398942OAI: oai:DiVA.org:miun-25894DiVA: diva2:856332
Note

CODEN: MSTCE

Available from: 2015-09-23 Created: 2015-09-23 Last updated: 2015-12-16Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Engberg, Birgitta A.
By organisation
Department of Chemical Engineering
In the same journal
Measurement science and technology
Materials EngineeringMechanical Engineering

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 686 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf